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Add clearer comments to VectorMaskCastIdentityTest.java

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erfang 2026-01-28 01:41:23 +00:00
parent 9c38a6d93e
commit f53d330ff0
1 changed files with 8 additions and 6 deletions
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14
test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastIdentityTest.java
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@ -49,14 +49,13 @@ public class VectorMaskCastIdentityTest {
} }
} }
// The types before and after the cast sequence are the same,
// so the casts will be eliminated.
@Test @Test
@IR(counts = { IRNode.VECTOR_MASK_CAST, "= 0" }, @IR(counts = { IRNode.VECTOR_MASK_CAST, "= 0" },
applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" }, applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" },
applyIf = { "MaxVectorSize", ">= 16" }) applyIf = { "MaxVectorSize", ">= 16" })
public static int testOneCastToSameType() { public static int testOneCastToSameType() {
// The types before and after the cast sequence are the same,
// so the casts will be eliminated.
VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0); VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0);
mInt128 = mInt128.cast(IntVector.SPECIES_128); mInt128 = mInt128.cast(IntVector.SPECIES_128);
// Insert a not() to prevent the casts being optimized by the optimization: // Insert a not() to prevent the casts being optimized by the optimization:
@ -76,6 +75,8 @@ public class VectorMaskCastIdentityTest {
applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" }, applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" },
applyIf = { "MaxVectorSize", ">= 16" }) applyIf = { "MaxVectorSize", ">= 16" })
public static int testTwoCastToSameType() { public static int testTwoCastToSameType() {
// The types before and after the cast sequence are the same,
// so the casts will be eliminated.
VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0); VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0);
VectorMask<Float> mFloat128 = mInt128.cast(FloatVector.SPECIES_128); VectorMask<Float> mFloat128 = mInt128.cast(FloatVector.SPECIES_128);
VectorMask<Integer> mInt128_2 = mFloat128.cast(IntVector.SPECIES_128); VectorMask<Integer> mInt128_2 = mFloat128.cast(IntVector.SPECIES_128);
@ -89,14 +90,13 @@ public class VectorMaskCastIdentityTest {
Asserts.assertEquals(count, mInt128.not().trueCount()); Asserts.assertEquals(count, mInt128.not().trueCount());
} }
// The types before and after the cast sequence are different,
// so the casts will not be eliminated.
@Test @Test
@IR(counts = { IRNode.VECTOR_MASK_CAST, "= 1" }, @IR(counts = { IRNode.VECTOR_MASK_CAST, "= 1" },
applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" }, applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" },
applyIf = { "MaxVectorSize", ">= 16" }) applyIf = { "MaxVectorSize", ">= 16" })
public static int testOneCastToDifferentType() { public static int testOneCastToDifferentType() {
// The types before and after the cast sequence are different,
// so the casts will not be eliminated.
VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0); VectorMask<Integer> mInt128 = VectorMask.fromArray(IntVector.SPECIES_128, mr, 0);
VectorMask<Short> mShort64 = mInt128.cast(ShortVector.SPECIES_64); VectorMask<Short> mShort64 = mInt128.cast(ShortVector.SPECIES_64);
return mShort64.not().trueCount(); return mShort64.not().trueCount();
@ -114,6 +114,8 @@ public class VectorMaskCastIdentityTest {
applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" }, applyIfCPUFeatureOr = { "asimd", "true", "avx2", "true" },
applyIf = { "MaxVectorSize", ">= 16" }) applyIf = { "MaxVectorSize", ">= 16" })
public static int testTwoCastToDifferentType() { public static int testTwoCastToDifferentType() {
// The types before and after the cast sequence are different,
// so the casts will not be eliminated.
VectorMask<Short> mShort64 = VectorMask.fromArray(ShortVector.SPECIES_64, mr, 0); VectorMask<Short> mShort64 = VectorMask.fromArray(ShortVector.SPECIES_64, mr, 0);
VectorMask<Float> mFloat128 = mShort64.cast(FloatVector.SPECIES_128); VectorMask<Float> mFloat128 = mShort64.cast(FloatVector.SPECIES_128);
VectorMask<Integer> mInt128 = mFloat128.cast(IntVector.SPECIES_128); VectorMask<Integer> mInt128 = mFloat128.cast(IntVector.SPECIES_128);